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Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 Depositary units [Member] | Apr. 22, 2014 Depositary units [Member] | Feb. 25, 2014 Depositary units [Member] | Jun. 30, 2014 Icahn Enterprises G.P. [Member] | May 06, 2014 Principal Owners and Affiliates [Member] | Jun. 30, 2014 Principal Owners and Affiliates [Member] | Feb. 28, 2013 Limited partners Depositary units [Member] | Jun. 30, 2014 Limited partners Depositary units [Member] | Jun. 30, 2014 General partner | May 05, 2014 Dividend Declared [Member] Limited partners Depositary units [Member]
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Icahn Enterprises | $ 489 | $ 54 | $ 460 | $ 331 |  |  |  |  |  |  |  |  |  |
Net income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation) | 479 | 53 | 451 | 324 |  |  |  |  |  |  |  |  |  |
Basic income per LP unit | $ 4.06 | $ 0.48 | $ 3.85 | $ 3.00 |  |  |  |  |  |  |  |  |  |
Basic weighted average LP units outstanding | 118,000,000 | 110,000,000 | 117,000,000 | 108,000,000 |  |  |  |  |  |  |  |  |  |
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |
Dilutive effect of unit distribution declared (income) |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |
Dilutive effect of unit distribution declared (units) |  | 1,000,000 |  | 0 |  |  |  |  |  |  |  |  |  |
Diluted income per LP unit | $ 4.06 | $ 0.48 | $ 3.85 | $ 2.99 |  |  |  |  |  |  |  |  |  |
Diluted weighted average LP units outstanding | 118,000,000 | 111,000,000 | 117,000,000 | 109,000,000 |  |  |  |  |  |  |  |  |  |
Units issues in connection with equity offering (ones) |  |  |  |  |  |  |  |  |  |  | 3,174,604 |  |  |
Equity offering per share amount (ones) |  |  |  |  |  |  |  |  |  |  | $ 63.00 |  |  |
Underwriter option to purchase additional depositary units |  |  |  |  |  |  |  |  |  |  | 476,191 |  |  |
Proceeds from equity offering |  |  | 164 | 1,242 |  |  |  |  |  |  |  | 194 |  |
Proceeds from equity offerings |  |  | $ 0 | $ 317 |  |  |  |  |  |  |  |  | $ 4 |
General partner ownership percentage in Icahn Enterprises |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |
Distribution declared per depositary unit |  |  |  |  |  |  | $ 1.50 |  |  |  |  |  |  | $ 1.50
Distribution Made to Limited Partner, Unit Distribution |  |  |  |  | 1,555,003 | 1,574,448 |  |  |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  |  |  |  |  |  |  | 88.20% | 88.20% |  |  |  |

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